I did the following
Subframe removed, fully stripped back and then re-galvanised, the wishbones at same time, including new balljoints. rear main crank seal while subframe is removed. Sump gasket done at same time.
strip back, treat and coat the front chassis legs too.
Front ARB bushes and...
I went through this very thing and agree what has been suggested, costs can certainly escalate along with the other things that will need doing. Even if they don’t you feel like it’s needed while everything is off to save on labour costs later down line..